positive definite ;
例句:
1、
本文讨论谱约束下实对称半正定矩阵束的最佳逼近问题,指出一般算法.
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2、
In this paper , some properties of weighted sub positive semidefinite matrices were discussed.
讨论了加权亚半正定矩阵的充要条件、分解、特征值、行列式等性质.
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3、
There are definite 4 different styles of ancient tower, it is worth a visit.
正定有4座风格不同的古塔, 值得一游.
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正定马家卤鸡、金华火腿、周村烧饼从1月18日开始,高铁外卖升级,这些特产居然也可以给旅客送上车了。Passengers on board high-speed trains can only order meals one hour prior to departure time starting from Jan. 18, which has be
导读:本周二河北正定发生大规模食物中毒事件，超过300名学生受影响，其中症状严重的有74人。More than 300 school children in northern China were treated for food poisoning late Tuesday night, raising fresh concerns over the sa
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